Why did Mr. Simpson say that he couldn't have been driving fast?
A.He had only been driving fifty yards on the main road.
B.He had just come out into the main road.
C.He had stopped fifty yards away.
D.He had always driven under fifty miles an hour.
第4题
川芎药理作用重要的物质基础是
A、香桧烯
B、川芎嗪和阿魏酸
C、川芎挥发油
D、尿嘧啶
E、川芎哚
第8题
用于治疗冠心病心绞痛的成分是
A.辛醛
B.欧前胡素
C.升麻素
D.川芎嗪
E.藁本内酯及正丁烯基苯酞
第9题
当归挥发油中的主成分是
A.辛醛
B.欧前胡素
C.升麻素
D.川芎嗪
E.藁本内酯及正丁烯基苯酞
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